Looking at race tickets -- are there assigned seats in all of the grandstands, or just some? I'm drawn to grandstand 34, so any input on those seats in particular would be appreciated. No seat assignment is provided through the checkout process on F1.com. First come first serve in that grandstand?

Looking at race tickets -- are there assigned seats in all of the grandstands, or just some? I'm drawn to grandstand 34, so any input on those seats in particular would be appreciated. No seat assignment is provided through the checkout process on F1.com. First come first serve in that grandstand?